We look at the division of 21537425 by 454 
We want to figure out the number of times 21537425 can be divided by 454.

Moving on to step 1:
If we divide 2 by 454, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 454

Going ahead to step 2:
If we divide 21 by 454, we get 0 and a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Take the next digit (5) from the dividend and append it to 21, then repeat: 215 / 454

Moving on to step 3:
215 divided by 454 is 0 with a remainder of 215.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 215 and we're left with 215.
Grab the next digit (3) from the dividend, add it to 215, then carry on: 2153 / 454

Let's proceed to step 4:
If we divide 2153 by 454, we get 4 and a remainder of 337.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 1816 from 2153 and we're left with 337.
Bring next digit (7) of the dividend behind the 337 and repeat the process: 3377 / 454

Moving on to step 5:
If we divide 3377 by 454, we get 7 and a remainder of 199.
Put 7 as the next digit of the answer. 
Result so far: 47.0
The remainder is 199 after subtracting 3178 from 3377.
Fetch the next digit (4) from the dividend, attach it to 199 and continue: 1994 / 454

On to step 6:
When dividing 1994 by 454, we get 4 with a remainder of 178.
The next digit of our result is 4. 
Result so far: 474.0
Subtracting 1816 from 1994 leaves us with 178.
Append the next digit (2) from the dividend to 178 and continue with: 1782 / 454

Let's proceed to step 7:
454 can be fit into 1782 3 times, resulting in a remainder of 420.
Write down 3 as next digit of the result. 
Result so far: 4743.0
Deduct 1362 from 1782 and we're left with 420.
Grab the next digit (5) from the dividend, add it to 420, then carry on: 4205 / 454

Going ahead to step 8:
When dividing 4205 by 454, we get 9 with a remainder of 119.
Use 9 as the next digit of our solution. 
Result so far: 47439.0
If we subtract 4086 from 4205, we get 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Moving on to step 9:
1190 divided by 454 is 2 with a remainder of 282.
The next digit of our result is 2. 
Result so far: 47439.2
If we subtract 908 from 1190, we get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Moving on to step 10:
When dividing 2820 by 454, we get 6 with a remainder of 96.
The next digit of our result is 6. 
Result so far: 47439.26
Subtracting 2724 from 2820 leaves us with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 11:
454 goes into 960 2 times with a remainder of 52.
Use 2 as the next digit of our solution. 
Result so far: 47439.262
Deduct 908 from 960 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 12:
If we divide 520 by 454, we get 1 and a remainder of 66.
Put 1 as the next digit of the answer. 
Result so far: 47439.2621
Subtracting 454 from 520 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 13:
If we divide 660 by 454, we get 1 and a remainder of 206.
The next digit of our result is 1. 
Result so far: 47439.26211
The remainder is 206 after subtracting 454 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

After the division, we end up with 47439.26211 and a remainder of 0.000206.